Ignition distributor for battery ignition plants



Nov. 4, 1941. n SCHWEIZER 2,261,835

IGNITION DISTRIBUTOR FOR BATTERY IGNITION PLANTS Filed Jan. 1'7, 194!)Patented Nov. 4, 1941 UNITED STATE IGNITION DISTRIBUTOR FOR BATTERYIGNITION PLANTS Karl Schweizer, Stuttgart, Germany, assignor to RobertBosch Gesellschaft mit beschrankter Haftung, Stuttgart, GermanyApplication January 11, 1940, Serial No. 314,363 In Germany January 26,1939 6 Claims.

This invention relates to an ignition distributor for igniting plants ofinternal combustion engines operating with a battery source of current.

So far, the casings of such ignition distributors were madesubstantially or entirely of metal and the interrupter plate and otherparts pertaining to the interrupter were fitted in the .casing in theform of separate parts. As a result, the production of the distributorswas relatively difficult and expensive, the more so, as a separatedistributor plate of insulating material carrying the distributorsegments had to be provided.

It is the object of the present invention to provide a construction ofanignition distributor permitting easy and cheap manufacture.

With this and further objects in view, as may become apparent from thewithin disclosures, the invention consists not only in the structuresherein pointed out and illustrated by the drawing, but includesfurtherstructures coming within the scope of what hereinaftermay beclaimed.

The character of the invention, however, may

i be best understood by reference to certain of its structural forms, asillustrated by the accompanying drawing in which:

Fig. 1 is an elevation of a distributor casing having the inventionapplied thereto.

Fig. 2 is an axial section through the casing, on line A-B-C of Fig. 3and Fig. 3 is a plan view from the top of the easing, with the cover androtor of the distributor removed.

Similar reierence parts in the different views.

According to the present invention the dis-Y tributor casing togetherwith the members to be fixedly secured thereto, such as, the interrupterplate and the cam screen consist ofa single integral part pressed ofinsulating material in which the distributor segments and the stationarymetal parts of the interrupter are embedded. Said integral part issecured to a flanged extension of the distributor base or shank so as toenclose all parts belonging to the distributor.

' Owing to the fact that the distributor casing itself consists ofinsulating material, it is possible to fit the distributor segmentsdirectly to the easing, thus saving a. separate insulating distributorplate of complicated shape. plate, asimple cover is provided for closingthe distributor casing. If desired, a connecting piece for the hightension conductor leading from the ignitor coil to the distributor maybe comprised in this cover.

numerals denote similar Referring now to the drawing in greater detail,it will be seen that a distributor casing a of pressed insulatingmaterial, such as, phenol formaldehyde condensation products, is securedto a flange b of the shank or base 0 of the distributor, by means ofstuds d which are embedded in the lower rim of the casing a in themoulding or pressing operation, and extend through holes or bores in theflange b, for en,-

gagement with washers e and nuts 1. 0n the i right hand side, the casinga is formed with a bulged portion 9 forming a downwardly open pocket forreception of a condenser h, Fig. 2, connected across an interrupterwhich, is arranged inside the casing a and not shown in the drawing. Thecondenser thus closes the pocket g. The top of the casing 11 is closedby a cover 1' Instead of this formed with an outlet for the passage ofhigh tension cables k and k leading from the distributor to the sparkplugs andfrom the'ignitor coil to the distributor, respectively, saidoutlet being roofed over by a projection i of the cover. The cover 1' iscentered on the casing by engagement with a recess a on the top edge ofthe casing and held in position by means of two springs 1, Fig. 1,spaced apart by 180 and engaging with their upper hook-shaped ends overtwo projections i" on the cover i while their lower ends are articulatedto the casing a, at l.

Integrally formed with the casing a, inside the same, are a base plate mfor the interrupter, Fi 2, and a cam screen member n. A bearing pin 0for-an interrupter lever p, Fig. 3 is embedded in the plate m in themoulding and hard- 5 ening operation, said'pin 0 serving at the sametime as a'guide member for a plate q supporting the stationaryinterrupter contact q which'is swingably mounted, for adjustment of thedistance between the interrupter contacts. After adjustment of thedistance between the contact points by an eccentric screw 1' the carrierplate q is clamped in position by a screw r which at the same timesecures a bent contact bar 8 establishing a well conducting electricalconnection between the condenser h and the body and 1 also clamping thecondenser h in the pocket g. The lower end of bar 8 is secured to theshank c by a screw 0'. Distributor segments 15 are embedded in the upperthickened rim of the casin a, for connection of high tension cables kleading to the spark plugs, by means of terminal screws ,i'. The hightension impulses are fed to the J distributor segments t from anignition coil (not shown) through a connecting piece u embedded in thecover 1 in, the moulding operation and a sliding contact w engaging thesame and being fixedly connected to a distributor finger v. Thedistributor finger v is secured on a rotor '0' rigidly mounted on adistributor shaft :1: which also carries a centrifugal governor x and acam 11 for operation of the interrupter lever p. The high tension cablesk and k are laterally held by means of ledges or ribs z and 2' formedintegral with the casing a and with the cover 1', respectively, andextending at the top of the easing from the distributor segments t, Fig.3, and from the contact piece it in the cover, Fig. 2, towards the cableoutlets.

The apparatus of the present invention has been described in detail withreference to specific embodiments. It is to be understood, however, thatthe invention is not limited by such specific reference but is broaderin scope and capable of other embodiments than those specificallydescribedand illustrated in the drawing.

I claim:

' 1. An ignition distributor for battery ignition plants comprising adistributor shank, a distributor casing, an interrupter plate, a camscreen member, distributor segments and stationary metal parts for theinterrupter, said distributor casing consisting of a single pressedinsulating part formed integral with said interrupter plate and camscreen member and having said distributor segments and said stationarymetal parts embedded therein, said casing being secured to a flangedextension of the distributor shank for enclosing all parts of thedistributor.

2. An ignition distributor for battery ignition plants comprising adistributor shank, a distributor casing, an interrupter plate, a camscreen member, distributor segments, a condenser and stationary metalparts for the interrupter, said distributor casing consisting of asingle pressed insulating part formed integral with said interrupterplate and cam screen member and having said distributor segments andsaid stationary metal pats embedded therein, said casing being providedwith a laterally-extending integral bulged portion providing a pocket toone side only of said distributor shank and which is open at its bottomfor reception of said condenser by which the opening of the pocket isclosed, said casing being secured to a flanged extension of thedistributor shank for enclosing all parts of the distributor.

3. An ignition distributor for battery ignition plants comprising adistributor shank, a distributor casing, an interrupter plate includinga contact bar, a cam screen member, distributor segments, a condenserand stationary metal parts for the interrupter, said distributor casingconsisting of a single pressed insulating part formed integral with saidinterrupter plate and cam screen member and having said distributorsegments and said stationary metal parts embedded therein, said casingbeing provided with a laterally-extending integral bulged portionproviding a pocket to one side only of said distributor shank and whichis open at its bottom for reception of said condenser by which theopening of the pocket is closed and which is secured in position by theclamping action of said contact bar, said casing being secured to aflanged extension oi the distributor shank for enclosing all parts ofthe distributor.

4. An ignition distributor for battery ignition plants comprising adistributor shank, a distributor casing, an-interrupter plate, a camscreen member, distributor segments and stationary metal parts for theinterrupter, said distributor casing consisting of a single pressedinsulating part formed integral with said interrupter plate and camscreen member and having said distributor segments and said stationarymetal parts embedded therein, said casing being formed with guide ledgesfor the high tension cables arranged at the top rim of the casing andgoing out from the distributor segments, and secured to a flangedextension of the distributor shank for enclosing all parts of thedistributor.

5. An ignition distributor for battery ignition plants comprising adistributor shank, a distributor casing, a cover of insulating materialfor said casing, an interrupter plate, a cam screen member, distributorsegments and stationary metal parts for the interrupter, saiddistributor casing consisting of a single pressed insulating part formedintegral with said interrupter plate and cam screen member and havingsaid distributor segments and, said stationary metal parts embeddedtherein, said casing being secured to a flanged extension of thedistributor shank for enclosing all parts of the distributor and saidcover having embedded therein, in the moulding operation, a connectingpiece for the high tension cable from the ignition coil to the ignitiondistributor.

6. An ignition distributor for battery ignition plants comprising adistributor shank, a distributor casing, a cover of insulating materialfor said casing, an interrupter plate, a cam screen member, distributorsegments and stationary metal parts for the interrupter, saiddistributor casing consisting of a single pressed insulating part formedintegral with said interrupter plate and cam screen member and havingsaid distributor segments and said stationary metal parts embeddedtherein, said casing being secured to a flanged extension of thedistributor shank for enclosing all parts of the distributor and saidcover having embedded therein, in the moulding operation, a connectingpiece for the high tension cable from the ignition coil to the ignitiondistributor and being-formed with a roofed-over lateral outlet for saidhigh tension cable.

KARL SCHWEIZER.

